Sound-box for talking-machines.



PATENTED SEPT. 25, 1906.

' L. P. DOUGLASS.

SOUND, BOX FOR TALKING MACHINES.

APPLICATION FILED APR. 20, 1905.

WiTNESSES. 76$

W, I N VENTOR: ,Lwwfl j/m yf 13 I 29 y ATTORNEY:

UNI-Tia sra rn s Parana" carton.

).\' l. DOUGLASS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR SOUND-Box FQR TALKING-MACHINES.

To a, whom it Duty concern:

Specification of Letters Patent.

Patented Sept. 25, 1906.

Application and April 20,1905. slain at. 266.680.

- F or.a fulLclear,- and exact description of Be it known that I, LEON F. DoUGLAss, a my lnvention reference may be had to the 55 citizen of the United States, and a resident of following specification and to theaccompanythe city of Philadelphia, State of Pennsyling drawings, forming a part thereof, in

Vania, have invented certain new and useful which- I Improvements in Sound-BoXes for Talking- Figure 1 is a perspective view of my im' Machines, of which the following is a full, proved sound-box; Fig. 2, a transverse secon clear, and complete disclosure. tional View thereof, taken suhstantiallyigon a i a .The object of my invention is to produce a line passing longitudinally through the ce1i [0 sound-box for a talkinganachine in which the ter. of the stylus-bar. Fig. 3 is a side clvastylus-bar is more delicately, perfectly, and tion thereof, showing the device for torsionefficiently mounted than heretofore and also ally mounting the stylus-bar in cross-section; 65 whereby the position and. tension of the st)- and Fig. 4 is a view talzcn substantially upon his-bar may be quickly and easily adjusted. the line 4 4, Fig. 3, showing a portion of the 'The further object of my invention is also casing of the sound-box.

' to provide, in combination with the features Referring to the drawings, the numeral 1 above referred to, meansfordelicatelymountindicates the usual cylindrical casing or ring 70 ing the diaphragm of the souiul-box, so that in which the diaphragm 2 is mounted, said fhe same may be vibrated with the most deliring being provided with a transverse part-i- 2o cate and minute vibrations of thcstylusdmr. tion or back 3, to which is attached the SOlillfl?" l-leretofore in sound-boxes in which the conducting tube 4 in any suitable or wellstylus barhas been mounted upon atorsional known manner. Within the ring 1 is pro- 7 device forgiving a tension thereto orfor holdvidcd a tapering or conical surface 5, upon ing said stylus-bar in position the torsional which is placed a corresponding gasket 6, of device or spring has been attached rigidly to rubber or other suitable elastic material. The the casing of the sound-box and to the stylusdiaphragm 2 is retained. in position with its barthat is to say, no means have been proextreme outer edge resting against the inner 8o. vidcd for the axial adjustment of the stylussurface of the gasket 6, said means for retainbar so thatitspressurc or tension in relation ing the diaphragm in position consisting of .30 to the diaphragm may be varied. l urtherany wcll-known expedient. such as wax or more, heretofore when the diaphragm has other cement T, springs, or even the pressure been mounted between a pair of gaskets of the stylus-bar of itself against the dia- 85, which contact with the marginal portions of phragni. the diaphraginsaid diaphragm ismore orlcss As means for mounting the stylus-bar I confined by the surfaces of the gaskets and pl'o\'idc the following parts: Attached. to one its free vibration to some extent hindered. portion of the periphery of the ring 1 is a U- lhis feature when taken in connection with shaped block 51 the arms of which are pro- '0 the lack of adjustability of the torsional vidcd with apertures in alinement, within mounting for the stylus-bar is a disadvanwhich are placed bushings of steel or other tage which reduces the cllicienc and quality suitable material, as indicated at 9. These ofthc reproduction by the sound-box. bushings S) are adapted to be retained in po- Brielly, my invention comprises the emsition within the holes in the block by bodiment in a sound-box of an improved tormeans of suitable set-screws, as indicated-at sional mounting and also a mounting which 10. The bushings 9 are provided with holes 45 may be easily ailju'stcd by mcans of suitable through which pass the small screws-i1,

clamping or holding devices both inrclation which are adapted to contact wit-h'thc torto the stylus-bar or in relation to the bearings sional pin. wire, or spring -1 2-; upon which the w for the torsional device. i stylus-bar is carried, suitable opcnings'being My invention also comprises the combinal provided in the block 8 to allow free passage 5? tion, with theabove features, of a diaphragm of the screws ll.

which is mounted so as tovibratv freely in The stvlus-bar consists of two main parts, response to the most minute and delicate via portion II; of which is adapted to receive l brations of the stylus-bar.

the stylus-needle and the portion); of which also operatively connected with phragm '2.

connects Willi the f rst-named POITIO'II and s the dia- The portion 13 is preferably I niad'e in the form of an L-shaped block, to one arm 15 of which is attached the portion 14, the other arnr of which is preferably cylindrical and provided with stylus-socket 16 and tl'iumh-scrow 1. Ad'accnt the apex of the angle of the L-shaped portion 1 3 of the Sty firmly in position in relation to the styluster to be very sensitive. during its torsional movement, caused by 'sional spring.

bar and the bushings 18.

, \Vhen the parts abovedescribed are assembled, the same will be substantially in the positions indicated in. 3that is, the bushings 9 and 18 will be securely held within their respective openings by screws 10 and 19, while the torsional'spring or wire 12 will be held securely within said bushings by screws and 11.

By virtue of the above-deseribed construction the sty1usbar may be adjusted both rotatably and longitudinally on the wire spring .12,"and, further, the said spring may be adjusted both rotatahly and longitudinally with reference to its clampingscrews INhen the proper adjustment is obtained, the wire spring Will be clamped to resist torsional movement by the screws 11 1.1 but the intermediate portion upon which thestylus bar is mountedwill cause the vibrations of th'elat- The wire spring1'2 the vibrationsof the stylus-bar, has a tendency to'fiex away from the lineof its axis; but this tendency is resisted by having bushingsiincasing the same throughout its entire length.

It isnot necessary that I should utilize a diaphragm mounted in the manner above de scrlbed, as my eli'icient mounting of the stylus-bar can be adaptedto any vibrating diaphragm; neither do I wish to limit myself to the exact details of construction herein set forth, as 1 may utilize any of the wellknown equivalents thereof, provided the same are withinthe scope of my invention as pointed out in the a pended claims.

Having t us described my invention, what I claim, and desire to protect by Letters Patent of the United States, isj 1 In a sound-box, astylussbar, a torsional spring passing thcrethrough and adjustably retained in connection therewith, and means Tor supporting the outer ends of sald torg 2. In a sound-box a stylus-ban'a torsional spring, which is r'otatably-adjustable in relation to said stylusbar and bearings for said torsional s ring within which said torsional spring is a so rotatably adjustable.

na sound-box, a stylus-bar, an axle passing through said stylus-bar, fixed bearings for saidaxle, and bushings interposed between said axle and said stylus-bar and said bearings.

4. In a sound-box, a stylus-bar, a torsional spring passing throu h said stylus-bar, fixed bearings for said s ring and bushings interosed between sai( torsional spring and said stylus bar and bearings. V v

. 5; In a sound-box, a stylus-bar, a torsional spring passingthrough said stylus-bar, fixed bearings for 'said spring and bushings interposed between said-stylus-bar and spring and between said bearings and said spring and inclosin said-spring for its entire ength.

6Q 11 a sound-box, a stylus-bar, an axle passing through'said stylus-bar, fixed bearlugs for said axle, and bushings interposed between said stylus-bar and axle, and he tween said bearings and said axleand inclosing said axle for its entire length.

7-.' In a sound-box, a

fixed bearings for said axle, bushings interposed between said bearings and axle, and means for clamping sa d bushm s to said axle and-"means for clampin sair bushings within said bearings and wit in said stylusbar. I I

j 8. In a sound-box, the combination with the stylus-bar, of a cylindrical torsional spring, said spring'being rotatably adjust? able or varyin the tension of said stylusbar, nd a dia Iiragm cooperating with said stylus-bar am edge only. .7 v 1 ,9. In a sound-box, the combination with a stylus-bar, .of a'cylindrieal torsional spring passing therethrough, bearings for said spring, bushings inter osed between said spring and bearings, am bushings interposed between said s rm and stylus-bar, means for holding saie bus rings rigidly in position, means for holding said torsional spring ad justably in'position within said bus,hings,and a diaphragm cooperating with. said stylusbag and mounted by its peripheral edge on y. 1 1

10. Ina sound-box, the combination with the stylus bar, of a cylindrical torsional spring, said sprin being rotatably adjustable for varying the tension of said stylusbarand a diaphragm cooperating with said stylu s-b ar,

. 11. In a sound-box, tho combination with a stylus-bar, of a cylindrical torsional spring passing therethrough, bearings for fsai spring,

bushings interposed between said stylus-bar, an axlepassing through said sty1us'bar, 'a'bushing interposed between said stylus-bar and axle,

mounted by its peripheral 12. In a sound-box, the combination with.

'a stylus-bar of a rotatably-adjustable torsional spring connected therewith, and a diaphragm cooperating with said stylus-bar.

13. In a sound-box, 'a stylus-bar, a torsional spring passing therethrough, and rotatably and longitudinally adjustable therein, and means arranged on each side of the styhis-bar for resisting the torsion of said spring.

14. In a sound-box, a stylus-bar, a torsional spring on which said stylus-bar is mounted, and means arranged on each side of the stylus-bar for resisting the torsion of saidspring. y

15. In a sound-box, a stylus-bar, a tor-- sional spring passing theret'hrough androtatably and longitudinally adjustable therein, and means arranged on each side of'the stylus-bar for supporting said spring.

16. In a sound-box, a stylus-bar, a torsional spring passing therethrough, the said st his-bar being rotatably and longitudinally a justable on said-spring, and means located 'on each side of the stylus-bar for supporting said sprmg.

17. In a sound-box, a stylus-bar, a torsional spring passing'therethrough and rotastylusbar bein tably and longitudinally ad'ustable therein, means arranged on each si e of the stylus bar to support said spring, and meansl'or rotatably and longitudinally adjusting the same.

18, In a sound-box, a stylus-bar, a torvsional sprin passing therethrough and longitudinally adjustable therein, and means arranged oneach side of the stylus-bar for re- I sisting the torsion of said spring.

' 19. In a sound-box, a stylus-bar, a torsional spring passing therethrongh and longitudinally adjustable therein, and means ar ranged on'each. side of the stylus-bar for supportin said spring.

20. n a sound-box, a stylus-bar,- a torsional spring passing therethrou h, the said longitudinally a justable on said sprin and means located on each side of the sty us-bar for supporting said spring.

21. In a sound-box, a stylus-bar, a torsional sprin passing therethrough, and longitudinally a justable therein, means arranged on each side of the stylus-bar to'support said spring, and means for longitudinally adjustsional spring upon which said stylus-bar is mounted, and means for preventing the, spring from bending or flexing out-of its alinement during its torsional movement.

24. In'a sound-box, a stylus-bar, a torsional springupon which said stylus-bar is mounted, means arranged on each side of said stylus-bar for resisting the torsion of said spring and means for maintaining the torsional portion of said spring in straight alinernent.

25. In a sound-box,-a torsional spring, a stylus-bar mounted thereon, and means for incasing the said spring throughout its entire length. l

26. In a sound-box, a wire spring having a stylus-bar mounted thereon, and a U-shaped block containing alined apertures in its arms, in which the extremities of said wire are supported.

27. In a sound-box, a torsional spring, a stylus-bar rotatably mounted thereon, supporting-arms having alined apertures there-" a torsional spring, supthe supporting-arms and a bushing within.

each aperture, the said spring being supported Within said bushings, the said bushings being in contact with each other to mcase the said spring throughout its entire length.

In witness whereof I have hereunto set my handthis 29thiday of March, A. D. 1905.

LEON a: nominee, 

